Typewriting machine



Oct. 26 1926.

' l ,604,636 c. rB. coRcoRAN ET AL TYPEWRITING MACHINE original FiledvDec- 30. 1922 Wa 54/W.

Patented Unt. Z5,

' LINE-TEM'ST1/aff@."i

retrasa CBRNELUS B. CORCORAN, DECEASED, LATE OF NEW YORK, N. Y.; BYMICHAEL J'. CORCORAN, ADMINSTRATOR, OF BROOKLYN, AND ALFRED Gr. F.KUROWSKI, OF BROOKLYN, NEW' YORK, ASSGNORS TO UNDERWOOD TYPEWRITERCOMPANY, CF NEWYORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRTING MACHINE.

riginal application filed. December 30, 1922, Serial No. 609,793.Divided and this application `filed January 21, 1925.

This invention relates to means for facilitating the releasing andreturning of a typewriter-carriage in a sonnd-deadening casing with thecarriage-release lever and carriage-return arm readily operable fromthee-:rterior of the casing.

In an Underwood portable typewriting machine the carriage is mountedconsiderably to the rear of the machine, so that when the machine isplaced in a sound-deadening casing the carriage is much nearer the topthan the front of the casing.

A feature oi the present invention relates to the provision of acarriage-release lever protruding through a slot in the top of thecasing. The carriage-release lever is pivotally mounted on a linedsupporting bracket which extends upwardly and serves as acarriage-return handle.` Both the lever and the bracket can'be easilyattached to or detached from the machine, so that a standard machine maybe used with or without the casing with littleor no alteration thereto.

Another feature of the present invention relates to the provision ofmeans between the carriage-return arm and the carriagerelease lever forlimiting and steadying the throw of the latter. Said means may comprisean outwardly-eiztending prong` on the carriage-return arm havingshoulders for engagement with a pin on the carriage-release lever forlimiting the throw of the lever, the pin being` provided with a head forengagement with the rear face of the prong for steadying the leveragainst forward or rearward movement.

This application is a division of application, Serial No. 609,793, tiledDecember' 30, i922. Y Y

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is an end view of a sound-deadening casing with a typewritingmachine therein, partly in cross-section, for illustrating the inventionmore clearly.

Figure. 2 is a front View of the righthand end of the carriage, showingthe car- 50 riage-release mechanism andthe carriagereturn arm.

The casing comprises Va body portion 1() Serial No'. 82,647.

securing the plate to the base 15 of the body-part of the casing. Theplate 11 may be further braced by means of a strip 16 extendinglongitudinally thereof on the base 15. A similar strip 17 may beextended from sideto side of the body-part, at

l the forward edge thereof, where the cover engages the base. The plate11, together with the rear wall 18 of the part 10and the side walls ofthe latter, forms an interior chambery adapted to receive the main frame19 and the carriage 20 of a typewriting machine. Thekeyboard-extension21 of the machine protrudes through, and forward of,the plate 11, so that the keyboard may be accessible when the outercover (not shown) is removed. This interior chamber has the rear wallthereof lined with sounddeadening material 22; ,the side walls thereofwith sound-deadening .material 23; the base thereof with sound-deadeningmaterial 2d; and the `front thereof with sounddeadening material 25,which latter is suitably secured to the plate 11. This inte-rior chamberis also provided with a cover 26, adapted to be swung up from its normalposition, in which position access may be had to the machine, forerasures and the like.. ldor 'centering and holding the machine to thecasing base 15, the rear feet 27 of the machine are moved into brackets28 and the front feet 29 into disks '30. The front of the machine islocked against upward movement by a plate 31, secured-to the upper edgeof the platev 11, and which crosses over, and fits down upon, the frontplate 39. of the machine. This plate 31 is provided with asound-deadening lining 33 and forms an upward continuation of the frontwall of the interior chamber to the lower front Vedge of the interiorcover 26 whe-n the latter is in normal posit-ion.

The cover, like the rest of the interior casing, is provided with alining 311; and this lining` is provided with a facing-piece 35, ofsheet-metal or other material, to prevent fouling of the paper, in themachine,

on th lining` 34 as the carriage moved in letter-feed and returndirections. The lower edges ot the side lining-members S6 ot the coverare held by strips 37. ln the front of the cover is a window, throughwhich the writing` on the platen may he observed. A window-pane 38, oiglass or other transparent material, is setinto a frame providedtherefor in the cover.

Since the machine is to be operated in the sound-prooi' inner casing,and since the side walls l2 of the casing-part IO 4form also the sidewalls of the interior sound-proof cha-mber, the length oi the severalparts ot the casing` must be such as to allow for full movement oi' thecarriage in letter-feed and return directions on the machine. Secured tothe carriage, however, are various operating levers and arms whichshould be accessible Ifrom the outside of the sound-prooi chamber. Theselevers and arms comprise a line-space lever (not shown), acarriageraclr-release-lever 39 and a carriage-return arm 40. It theselevers and arms are to project to the outside otl the sound-proofchamber, the latter must be slotted to per- Amit them to traveltherealong,` withvthe carriage. `Such a slot is shown at il in the covervat the rear of the window-pane. Resilient cushions 4-2 are providedwhich come together to close the slot, except at the Vpoints where theleversand arms protrude therethrough.

The carriage-return arm i0 is a iiXed arm at the iront, and at theright-hand end of the platen, which forms a continuation of aV bracket43, which is extended under the platen-axle, to the rear thereof, andmade tast to an ear il on the right-hand carriage side plate e5. rThecarriage-racl-releaselever 39 is a bell-crank-lever pivoted at i6 to thecarriage-return arm. One arm i7 of this bellrranh-lever projectsrightward, and terminates in a rearwardly-odset lip i8, which underlies,and is adapted to engage, a lip or detent e9, oiiset lettward from theravir-release-lever 50, commonly 'found in the Underwood standardportable t pewriter. rlhe lever is alever pivoted on t 1e platenaxle,and having a` rearward extension 5l,

cariving a Vingenpiece 52, by depression of Y which the carriage-rackhas heretofore been released. The lever 50 has a yoke in which is iittedthe end 5e of an arm 55, torining` part ot a belLCranl-lever pivot-ed at5G to the right-hand carriage side plate. The other arm 57 of thisbell-cranl-lever supports Y the right-hand end of the carriage-rack 58.

The lei't-hand end oi' the carriage-rack 58 supported by an arm (notshown), but similar to the arm 57 pivoted at the righthand side ot' thecarriage. ln the normal position of the parts the rack 5S meshes with adrive-pinion 59. rl`he escapement mechanism and spring-drum hy means ofnewness which the racl; 58 is driven from the pinion 59, are not shown,but may be such as are found in the Underwood machine. When thebell-crank-lever -57 is rocked coun-- terclochwise, by the lever 50, therack is lifted out oit engagement with the pinion 59, to permit the treemovement of the carriage. As just described, leftward throw of therack-release-lever 39 moves the lever 50 in such manner as to releasethe rack.

rl'he carriage-'return arm 40 has a rightward projecting prong orextension GO, the upper surface (31 ot which is shaped on an arc struckfrom the pivot i6 as a center; and Vthe lever 39 carries a pin 62adapted to ride on the edge 6l, and, by abutment with shoulders 63 and6st-, respectively, at the lett and right hand ends of the curve 6i, todetermine the throw of the lever 89 in either direction. rlhrow of thelever 39 to the leiit first releases the rack; and continued leftwardpressure on the lever 39, after the pin 62 has struck the shoulder 63,will result in leitward movement of the carriage. 'llo steady the lever39 against forward and rearward'movement on its pivot 46, the pin 62 isprovided with a head 65 vfor engage ment with the rear face of the Prongon the carriagereturn arm.

`Variations may he resorted to within the scope oit the invention, andportions of the improvements may he used without others.

Having thus described the invention, we claim: x

l. ln a typewriting machine, a platen, a platen-carriage, a raclr on thecarriage, a pinion for engagein .it with the rack to et- 'fectletter-feed movement oit' the carriage, a lever on the carriage fordisengaging the rack iiroin the pinion when rocked in a plane at rightangles to the rack, a shoulder on the lever, and a second lever pivotedto swing at right angles to the plane ot' movenient ot' the first leverand to project through an openinlgl in a sound-prooi casing for themachine; the second lever being.;` a hell-crank lever, one arm of whichis adapted to engage thev ol'set on the iirst lever and to roch thelatter to release the rack when the second lever is swung on its pivot.

2. in a typewriting nr chine, a platen, a plaiieirc-arriage, a raclr onthe carriage, a pinion for engagement with the rack to eti'ectletter-ieed movement ot thc carriage, a lever on the carriage fordisengaging the rack from the pinion when rocked in a plane at rightangles to the rack, a shoulder on the lever-, a seco-nd lever pivoted toswing at right angles to the plane of movement of the lirst lever .andto project through an op'eningin a sound-prooil casing for the mallflllS

chine, the second lever being a bell-crank lever, one arm of which isadapted 'to engage the oiset on the first lever and 'to rock the latterto release the rack when the second lever is swung on its pivot, and abracket on the platen-carriage to which the second lev-er is pivoted;the bracket having as an extension thereof a carriage-return arm adaptedto project through the opening in the sound-proof casing.

3. In a typewriting machine, a platen, a platen-carriage, a rack on thecarriage, a pinion for engagement with the rack to et- 'fect letter-feedmovement of the carriage, a lever on the carriage for disengaging therack from the pinion when rocked in a plane at right angles to the rack,a shoulder on the lever, a second lever pivoted to swing at right anglesto the plane of movement of the first lever and to projectv through anopening in a sound-proof casing tor the machine; the second lever beinga bell-crank lever, one arm of which is adapted to engage the offset onthe first lever .and to rock the latter to release the rack when thesecond lever is swung on its pivot, a bracket on the platen-carriage towhich the second lever is pivoted; the second lever having a pin orshoulder thereon adapted to ride on a portion of the bracket, andshoulders on the bracket for determining the throw of such lever.

il. In a typewriting machine, a platen, a platen-carriage, a rack on thecarriage, a pinion Jr'or engagement with the rack to e-. feetletter-feed movement ot the carriage, a lever on the carriage fordisengaging the rack from the pinion when rocked in a plane at rightangles to the rack, a shoulder on the lever, a second lever pivoted toswing at right angles to the plane of movement of the first lever and toproject through an opening in a sound-proof casing lor the machine; thesecond lever being a bellcrank lever, one arm of which is adapted toengage the `oiTset on the lirst lever and to rock the latter to releasethe `rack when the second lever is swung -on its pivot, and a bracket onthe platen-carriage to which the second lever is pivoted; the secondlever having a headed pin thereon adapted to ride on a portion ot' thebracket, with such portion ot the bracket between the lever and the headof the pin, to steady the lever against forward and rearwarddisplacement.

5,. In a typewriting machine, a platen, a platen-carriage, a rack -onthe carriage, a pinion for engagement with the rack to effectletter-feed movement of the carriage, a lever on the carriage fordisengaging the rack from the pinion when rocked in a plane at rightanglesl to the rack, .a shoulderY on the lever, a second lever pivotedto swing at right angles to the plane of movement of the irst lever andto project through an opening in a sound-proot casing for the machine,and a carriage-return arm fast to the carriage and adapted to projectthrough the opening in the sound-proof casing; the sec-ond lever beingpivoted to the carriagereturn arm.

6. In a typewriting machine, a platen, a platen-carriage, a rack on thecarriage, a pinion for engagement with the rack to effeet letter-feedmovement of the carriage, a

lever on the carriage for disengagng the rack Jfrom the pinion whenrocked in a plane at right angles to the rack, a shoulder on the lever,a second lever pivoted to swing at right angles to theplane of movementof the first lever and to project through an opening in a sound-proofcasing for the machine, a carriagereturn arm fast to the carriage andadapted to project through the opening in the sound-proof casing; thesecond lever being pivoted to the carriage-return arm, a lateraleXtension or prong on the carriage-return arm having shoulders thereon,and a pin or shoulder on the second lever adapted to engage theshoulders on the carriage-return arm to determine the throw of thesecond lever.

7. In a typewriting machine, a platen, a platen-carriage, a rack on thecarriage, a pinion for engagement with the rack to effect letter-feedmovement of the carriage, a lever on the carriage for disengaging therack from the pinion when rocked in a plane at right angles to the rack,a shoulder on the lever, a second lever pivoted to swing at right anglesto the plane of mov-ement ot the tirst lever and to project through anopening in a sound-proof casing for the machine, a carriage-return armfast to the carriage and adapted to project through the opening in thesoundedeadening casing; the second lever being pivoted to thecarriager-eturn arm, a lateral extension or prong on the carriage-returnarm having shoulders thereon, and a headed pin on the second leverbetweenV the head of which and the lever the extension or prong lies tosteady the second lever against forward and rearward displacement.

MICHAEL J. CORCORAN, Administrator of the estate of @0r/nehm B.

oreorcm, deceased.

ALFRED G. F. KURQVSKI.

